KS8721SL-EVAL Micrel Inc, KS8721SL-EVAL Datasheet - Page 31

• Manufacturer Part Number: KS8721SL-EVAL
• Description: BOARD EVAL EXPERIMENT KS8721SL
• Manufacturer: Micrel Inc

Specifications of KS8721SL-EVAL

• Main Purpose: Interface, Ethernet Controller (PHY and MAC)
• Embedded: No
• Utilized Ic / Part: KSZ8721SL
• Primary Attributes: 1 Port, 100BASE-TX/100BASE-FX/10BASE-T
• Secondary Attributes: MII, RMII, Auto MDI, MDIX, >130 Meter Cable Driver, LDO, IEEE802.3u Compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 576-1010

KS8721BL/SL (3.3V Single Power Supply 10/100BaseTX/FX MII Physical Layer Transceiver)
Media converter operation
KS8721BL/SL is capable of performing media conversion with 2 parts in a
back-to-back RMII mode as indicated in the diagram. Both parts are in RMII
mode and with RMII_BTB asserted (pin21 & 22 strapped high). One part is
operating at TX mode and the other in FX mode. Both parts can share a
common 50MHz oscillator.
Under this operation, auto-Negotiation on the TX side will prohibit 10baseT
link up. TXD2, active High, can disable transmitter and set it at tri-state.
RXD2 serves as energy detection can indicate if there is line signal detected.
TXD3 should tied low and RXD3 let float.
Please contact Micrel FAE for Application Note.
To the SD pin of the
Fiber Module
Rx +/-
Tx +/-
FTx
FRx
KS8721BL/SL
KS8721BL/SL
Pin
34
- 31 -
(Fiber Mode)
Ref_CLK
Ref_CLK
21 22
21 22
TxC/
Pin
Pin
TxC/
KS8721BL/SL Preliminary Rev 0.90
Vcc
TxD
RxD
Vcc
TxD
RxD
Aug, 2003
50 MHz
OSC